Merged revisions 285931 via svnmerge from

https://origsvn.digium.com/svn/asterisk/branches/1.8

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  r285931 | tilghman | 2010-09-09 20:25:50 -0500 (Thu, 09 Sep 2010) | 21 lines
  
  Merged revisions 285930 via svnmerge from 
  https://origsvn.digium.com/svn/asterisk/branches/1.6.2
  
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    r285930 | tilghman | 2010-09-09 20:16:32 -0500 (Thu, 09 Sep 2010) | 14 lines
    
    Merged revisions 285889 via svnmerge from 
    https://origsvn.digium.com/svn/asterisk/branches/1.4
    
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      r285889 | tilghman | 2010-09-09 19:13:45 -0500 (Thu, 09 Sep 2010) | 7 lines
      
      Fix Mac OS X build.
      
      This also fixes a rather grievous calculation error for the offset of
      ast_fdset, which was masked on Linux and FreeBSD, because these platforms
      check the first 256 FDs regardless of the bitmask setting (due to backwards
      compatibility).
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git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@285932 65c4cc65-6c06-0410-ace0-fbb531ad65f3